Method for transmitting and receiving message of short message broadcasting services in telecommunication system

ABSTRACT

A method for transmitting and receiving short message broadcast services in a communication system is disclosed. The present invention reduces a battery consumption of a mobile station by additionally using an inserted message field of a broadcast indicator for notifying whether a broadcast message is being transmitted from a base station to the MS, thereby allowing a more efficient short message broadcast service.

BACKGROUND OF THE INVENTION

1. Field of the Invention

The present invention relates to mobile communication services, and moreparticularly to a method for transmitting and receiving short messagebroadcasting services in a code division multiple access communicationsystem.

2. Description of the Related Art

Short Message Service (SMS) procedure for a code division multipleaccess (CDMA) system includes transmitting broadcast messages from aShort Message Service Center (SMSC) to mobile stations through a basestation (BS), and receiving the broadcast messages transmitted from theBS at a mobile station MS. Generally, the BS transmits broadcastmessages to a MS through two forward channels, namely a paging channeland a broadcast channel. A MS receiving the SMS chooses the messagesfrom among the transmitted broadcast messages.

The BS may transmit broadcast messages using one of various transmittingmethods such as a multi-slot broadcast transmission, a multi-slotbroadcast paging or a periodic broadcast paging. Of these methods, themulti-slot broadcast message transmission is the simplest, causing theleast amount of delay in transmission, and is used regardless of whethera periodic broadcast paging transmission is available. In the multi-slotbroadcast message transmission, broadcast messages are transmitted froma BS to MSs within the service region of the BS through all slots of acontrol channel. However, because the broadcast messages are transmittedusing all slots of the control channel, an overload of the controlchannel may occur, thereby impeding transmission of messages other thanthe broadcast messages.

On the other hand, the multi-slot broadcast paging is used when theperiodic broadcast paging is unavailable. In this method, a generalpaging message of a relatively small size, which indicates a forthcomingtransmission, is first transmitted to MSs through all slots of thecontrol channel before transmitting a broadcast message of a large size.

However, the periodic broadcast paging is a more efficient method thanthe multi-slot broadcast transmission as well as the multi-slotbroadcast paging methods. In the periodic broadcast paging, a BS gives anotice to MSs of the periodic transmission of broadcast messages beforeperiodically transmitting the broadcast messages. Particularly, a BSfirst transmits a general page message including a broadcast pageinformation in every first slot of a broadcast cycle. Thereafter, a MScan determine the type and time of the message transmission based on thebroadcast page and receive broadcast messages in consecutive slots ofthe broadcast cycle.

A detailed explanation of the periodic broadcast paging, which is mostcommonly used by communication systems including the CDMA, will follow.However, a description of a common control channel will first beprovided. The common control channel is a channel used when a BStransmits an overhead information required for the operation of a MS aswell as a general paging message for paging a MS.

Generally, the common control channel is a paging channel or a broadcastchannel, but for purposes of explanation, the operation of the commoncontrol channel will be discussed with respect to the paging channel.However, such operations can also be performed through a broadcastchannel.

FIG. 1 shows a general configuration of a paging channel for the SMS. Asshown in FIG. 1, a BS loads and transmits broadcast messages in a slotof 80 ms, where each slot recurs in every 2048 slot of the pagingchannel with respect to the system time. The slot (SLOT_NUM) at which abroadcast message is transmitted can be calculated by Equation 1 below,where ‘t’ represent a system time for each am of the paging channel.

SLOT_NUM=└t/4┘mod 2048  [1]

A MS remains in a non-active state and becomes active to receivebroadcast messages transmitted in the 80 ms slot of the paging channel.Upon receipt of the messages, the MS returns back to the non-active oridle state. The periodic broadcast paging method in the related art willnext be discussed with reference to FIG. 2.

Referring to FIG. 2, a BS transmits broadcast page information in everyfirst slot of a broadcast cycle and transmits broadcast messages insubsequent slots of the broadcast cycle to MSs. A MS which is configuredto receive SMS broadcast message then receives the broadcast messagesbased on broadcast page(s) by periodically monitoring every first slotof the broadcast cycle to receive the broadcast page information. Here,the maximum interval of the broadcast cycle (M) can be calculated byEquation 2, where ‘i’ represents a maximum slot cycle index(MAX_SLOT_CYCLE_INDEX) field value of a system parameter messagetransmitted to a MS through the paging channel.

M=2^(i)×16, 0≦i≦7  [2]

Accordingly, based upon the broadcast cycle M, a BS transmits broadcastpage information through a first slot of a broadcast cycle, where theslot number is calculated by Equation 3 below. In other words, the BStransmits Broadcast Pages 1, 2, and 3 through the first slot a broadcastcycle, which is indicated as ‘0’ in the paging channel shown in FIG. 2.

└t/4┘mod M=0  [3]

Each broadcast page transmitted through the first slot as describedabove, includes at least one broadcast address (BC_ADDR), where eachBC_ADDR includes information regarding a broadcast message. As shown inFIG. 2, the first broadcast page would include two broadcast addressescorresponding to the first broadcast message in slots 3 and 4, thesecond broadcast page would include a broadcast address corresponding tothe second broadcast message in slot 6, and the third broadcast pagewould include three broadcast addresses corresponding to the thirdbroadcast message in slots 9˜11. Thus, a BS periodically transmitsbroadcast page(s) in the first slot and broadcast messages in subsequentslots of the broadcast cycle, after notifying MSs of its broadcast cyclethrough a system parameter message of the paging channel.

Here, a broadcast index field (BCAST_INDEX) of an expanded systemparameter message is used. Namely, a value of BCAST_INDEX is set as ‘i,(1≦i≦7)’ when the BS is providing a SMS and ‘0’ otherwise. If the valueof the BCAST_INDEX is set as ‘i,’ the broadcast cycle in which thebroadcast message is transmitted can be calculated using Equation 4.

B=2^(i)×16, 1≦i≦7  [4]

After the value of B is obtained by Equation 4, the broadcast message istransmitted by a broadcast cycle of (B+3) and the first slot of thebroadcast cycle can be calculated by Equation 5.

└t/4┘mod M(B+3)=0  [5]

When broadcast messages are periodically transmitted through a pagingchannel, a MS must also periodically monitor the assigned pagingchannel. Thus, a MS receives the transmitted broadcast page(s) from theBS through the first slot of the broadcast cycle and if severalbroadcast addresses (BC_ADDR) are included in the broadcast page(s), theMS checks the subsequent slots to receive the necessary broadcastmessage.

In the CDMA system of the related art for the SMS, the broadcast indexfield BCAST_INDEX of the expanded sys parameter message is used only toset the state of a broadcast cycle and thus the SMS on or off. As aresult, a BS cannot notify MSs that there is no broadcast messagetransmitted during certain broadcast cycles. Thus, a MS has toperiodically monitor the common control channel to receive broadcastmessages from a BS. Accordingly, a MS must periodically check the commoncontrol channel for at least every 80 ms, even when there are nomessages transmitted from a BS. This unnecessarily wastes the powerconsumption of a MS.

SUMMARY OF THE INVENTION

Accordingly, an object of the present invention is to solve at least theproblems and disadvantages of the related art.

Another object of the present invention is to provide amore efficientmethod for transmitting and receiving short broadcast message servicesin a communication system.

A further object of the present invention is to provide a method fortransmitting and receiving short broadcast message services in acommunication system which reduce a battery consumption of a mobilestation.

Additional advantages, objects, and features of the invention will beset forth in part in the description which follows and in part willbecome apparent to those having ordinary skill in the art uponexamination of the following or may be learned from practice of theinvention. The objects and advantages of the invention may be realizedand attained as particularly pointed out in the appended claims.

To achieve the objects and in accordance with the purposes of theinvention, as embodied and broadly described herein, a method fortransmitting and receiving short broadcast message services in acommunication system comprises transmitting a broadcast indicator tonotify whether a base station is transmitting a broadcast message to amobile station; receiving the broadcast indicator by a mobile station;and receiving the broadcast message transmitted from the base stationthrough a common control channel during a broadcast cycle when thebroadcast message is transmitted at a predetermined broadcast cycle fromthe base station using the received broadcast indicator.

In another embodiment of the present invention, a method fortransmitting and receiving short broadcast message services in acommunication system comprises transmitting, from a base station to amobile station, a broadcast indicator through an expanded systemparameter message to notify whether the base station is transmitting acurrent broadcast message; determining, at the mobile station, abroadcast indicator value at an arrival time of the broadcast cyclenotified by the base station; periodically checking, at the mobilestation, a corresponding common control channel when the currentbroadcast message will be transmitted; and receiving, at the mobilestation, a corresponding broadcast message along with periodicallychecking the channel totted the broadcast message.

BRIEF DESCRIPTION OF THE DRAWING

The invention will be described in detail with reference to thefollowing drawings in which like reference numerals refer to likeelements wherein:

FIG. 1 shows a paging channel for a SMS;

FIG. 2 shows a paging channel to explain a periodic broadcast pagingmethod in the related art

FIGS. 3 and 4 show a paging channel for a broadcast message transmittingand receiving method according to the present invention;

FIGS. 5 to 7 show a quick paging channel to explain a SMS according tothe present invention; and

FIG. 8 shows a partial field of an expanded system parameter messageaccording to the present invention.

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS

Reference will now be made in detail to the preferred embodiments of thepresent invention, examples of which are illustrated in the accompanyingdrawings. Generally, the present invention transmits a broadcastindicator to a mobile station through a quick paging channel (QPCH) tonotify the MS whether a base station is transmitting a broadcast messagethrough a control channel. As in the related art, the control channelmay be either a paging channel or a broadcast channel, but for purposesof explanation, the present invention will be discussed with respect tothe paging channel.

FIG. 3 shows a paging channel for transmitting and receiving SMSaccording to the present invention. Also, FIG. 4 is an enlarged diagramof the paging channel of FIG. 3 and FIG. 5 shows a configuration of theQPCH to explain the SMS according to the present invention. Namely, thepresent invention additionally uses a QPCH_BI_SUPPORTED field in anexpanded system parameter message. The QPCH_BI_SUPPORTED field is usedto notify whether a BS provides a broadcast indicator to a MS.

Referring to FIG. 3, as in the CDMA mobile communication system in therelated art, a BS loads and transmits broadcast message(s) in the 80 msslot intervals of a broadcast cycle. However, in the present invention,a broadcast indicator as well as a paging indicator and a configurationchange indicator are also periodically transmitted in an 80 ms intervalto the MS through the QPCH, before transmitting the broadcastmessage(s), as shown in FIGS. 4 and 5. In the preferred embodiment, theindicators are transmitted 100 ms prior to transmitting the broadcastmessages.

As in the related ark the broadcast cycle has a period of 2048 whereeach slot recurs in every 2048 slot of the paging channel with respectto the system time and the slot number SLOT_NUM in which a broadcastmessage is transmitted can be calculated by Equation 1. Similarly, avalue of the maximum slot cycle index MAX_SLOT_CYCLE_INDEX field of thesystem parameter message is transmitted to the MS through the pagingchannel from the BS before periodically transmitting the broadcastmessage(s) and is used to calculate the maximum broadcast cycle M byEquation 2 above. Accordingly, the BS transmits the broadcast pageinformation through the first slot of the broadcast cycle as calculatedby Equation 3 based upon the maximum broadcast cycle M.

Also, the broadcast page information transmitted through the first slotof the broadcast cycle includes at least one broadcast addresses(BC_ADDR), where a BC_ADDR includes information regarding the broadcastmessage. Thereafter, the BS periodically transmits broadcast messages insubsequent slots corresponding to the broadcast address(es) in thebroadcast cycle.

Furthermore, as in the related art, a broadcast index field BCAST_INDEXof an expanded system parameter message is used, where a value ofBCAST_INDEX is set as ‘i, (1≦i≦7)’ when a BS provides a SMS and ‘0’otherwise. If the value of the BCAST_INDEX using 3 bits is set as ‘i,’the broadcast cycle in which the broadcast message is transmitted can becalculated using Equation 4. After the value of B is obtained byEquation 4, a broadcast message can be transmitted by a broadcast cycleof (B+3) and the first slot of a broadcast cycle can be calculated byEquation 5.

According to the present invention, however, a BS may provide abroadcast indicator and a QPCH_BI_SUPPORTED field to MSs to notify thatthe BS is transmitting broadcast message(s). If a BS provides abroadcast indicator to MSs, the QPCH_BI_SUPPORTED of the expanded systemparameter message would be set to a value of “1” to notify an existenceof a broadcast indicator, and otherwise to a value of “0”. Here, thevalue of QPCH_BI_SUPPORTED may alternatively be set to “0” to notify theexistence of a broadcast indicator and to “1,” otherwise.

The broadcast indicator which notifies an existence of a broadcastmessage is included and transmitted through the QPCH, where the QPCH istransmitted 100 ms prior to the transmission of a paging channel slotincluding a broadcast message. Moreover, the QPCH includes and transmitsthe paging indicator and a configuration on change indicator as well asthe broadcast indicator. Particularly, the broadcast indicator may beinserted and transmitted in a reserved region of the QPCH. A MS thentemporarily stores QPCH_BI_SUPPORTED field value of the expanded systemparameter message from the BS in a memory device. If a MS in anon-active state is configured to receive a broadcast message, such MSwould periodically monitor the first slot of the paging channel in everybroadcast cycle.

However, if the QPCH_BI_SUPPORTED field value of the extended systemparameter message is set to ‘1’ and if a MS is configured to receive abroadcast indicator, such MS would check the QPCH transmitted 100 msbefore each slot of the paging channel in the broadcast cycle todetermine the broadcast indicator value and the BCAST_INDEX value. Thus,if the QPCH_BI_SUPPORTED field value is set to “1” and the broadcastindicator is also set to “1,” a MS would determine that a broadcast pageinformation and broadcast message(s) is transmitted through the pagingchannel and would monitor the paging channel to receive the necessarymessages.

If the QPCH_BI_SUPPORTED field value is set to “1” while the broadcastindicator is set to “0,” and the BCAST_INDEX value is “0,” then a MSwould enter into an idle state without monitoring the paging channel.

If the “QPCH_BI_SUPPORTED” field value is set to “0,” a MS wouldperiodically monitor the first slot of the paging channel for easybroadcast cycle as in the related art, and would receive the broadcastpage information from the BS. Furthermore, if several broadcastaddresses (BC_ADDR) are included in the broadest page information, a MSwould monitor hew subsequent slots to receive the necessary broadcastmessage.

FIG. 6 shows the QPCH of FIG. 5 when the data rate is 4800 bps and FIG.7 shows the QPCH of FIG. 5 when the data rate is 9600 bps. Namely, FIGS.6 and 7 show configurations of the QPCH of FIG. 5 in which 1, 2 or 4bits are used for transmitting the broadcast indicator. However, using 1bit for the broadcast indicator requires a high power supply. Therefore,by transmitting the broadcast indicator using at least 2 bits, as shownin FIGS. 6 and 7, lowers the power consumption and reduces aninterruption factor.

FIG. 8 shows a portion of the expanded system parameter message fieldwhich additionally includes the QPCH_BI_SUPPORTED field and thebroadcast index field (BCAST_INDEX) of 3 bits according to the presentinvention.

According to the present transmitting and receiving method of shortmessage broadcast services, the BS notifies to the MS, in advance,whether a transmission of broadcast message currently exists. Therefore,a MS need not unnecessarily and periodically monitor the common controlchannel (the paging channel or the broadcast channel) to receive abroadcast message from the BS, if there is no broadcast message. Thus,the present invention prevents a waste of power consumption by the MSand increases the efficiency of the short message broadcast services.

The foregoing embodiments are merely exemplary and are not to beconstrued as limiting the present invention. The present teachings canbe readily applied to other types of apparatuses. The description of thepresent invention is intended to be illustrative, and not to limit thescope of the claims. Many alternatives, modifications, and variationswill be apparent to those skilled in the art.

What is claimed is:
 1. A method for transmitting and receiving shortmessage broadcast services in a communication system comprising:transmitting a broadcast indicator using a common control channel, thebroadcast indicator indicating a transmission of a broadcast message ona paging channel or a broadcast channel, wherein the common controlchannel is a different channel from the paging channel or the broadcastchannel; receiving at the mobile station, the broadcast indicatorthrough the common control channel and checking a status of thebroadcast indicator; and receiving, at the mobile station, the broadcastmessage through the paging channel or the broadcast channel during abroadcast cycle if the status of the broadcast indicator receivedthrough the common control indicates the transmission of the broadcastmessage on the paging channel or the broadcast channel.
 2. A method ofclaim 1, further comprising transmitting, from said base station to themobile station, an index through the paging channel prior totransmitting the broadcast indicator the common control channel, whereinthe index is used to calculate the broadcast cycle.
 3. A method of claim1, wherein the common control channel is a quick paging channel and thebroadcast indicator is transmitted through the quick paging channelbefore transmitting the broadcast message through the paging channel orthe broadcast channel.
 4. A method of claim 3, wherein the broadcastindicator is provided in a reserved region of the quick paging channel.5. A method of claim 4, wherein the quick paging channel furtherincludes a paging indicator and a configuration change indicator, andthe broadcast indicator is located between the paging indicator and theconfiguration change indicator.
 6. A method of claim 3, whereintransmitting the broadcast indicator by at least 2 bits.
 7. A method ofclaim 3, wherein transmitting the broadcast indicator 100 ms prior totransmitting a broadcast message.
 8. A method of claim 1, furthercomprising: setting a field to an expanded system parameter message andtransmitting said set field to the mobile station, wherein said setfield notifies whether said base station provides a broadcast indicatorthrough the common control channel; and checking, at the mobile station,the status of the broadcast indicator received through the commoncontrol channel, if set said field indicates that said base stationprovides a broadcast indicator on the common control channel.
 9. Amethod of claim 8, wherein monitoring, at the mobile station, a firstslot of a control channel in every broadcast cycle, if said fieldindicates that said base station does not provide a broadcast indicator.10. A method of claim 8, wherein transmitting said set field to themobile station before transmitting a broadcast message to the mobilestation.
 11. A method of claim 8, wherein temporarily stowing said fieldin a memory device of the mobile station.
 12. A method of claim 1,wherein the mobile station enters an idle state if the broadcastindicator of the common control channel indicates non-transmission of abroadcast message through the paging channel or the broadcast channel.13. A method for transmitting and receiving short message broadcastservices in a communication system comprising: setting a field to anexpanded system parameter message and transmitting said set field to amobile station, wherein said field notifies whether a base stationprovides a broadcast indicator on a quick paging channel; transmittingthe broadcast indicator through the quick paging channel beforetransmitting a broadcast message on a paging channel or the broadcastchannel to notify whether the base station is transmitting a broadcastmessage to a mobile station; receiving and checking, at the mobilestation, the status of the broadcast indicator on the quick pagingchannel, if said set field indicates that the base station provides thebroadcast indicator on the quick paging channel; and receiving, at themobile station, the broadcast message from said base station when thestatus of the broadcast indicator on the quick paging channel indicatesthat said base station is transmitting a broadcast message on the pagingchannel or the broadcast channel, during a broadcast cycle.
 14. A methodof claim 13, wherein inserting and transmitting the broadcast indicatorin a reserved region of the quick paging channel by at least 2 bits. 15.A method of claim 13, wherein transmitting the broadcast indicator onthe quick paging channel 100 ms prior to transmitting the broadcastmessage on the paging channel or the broadcast channel.
 16. A method ofclaim 13, wherein monitoring, at the mobile station, a first slot of acontrol channel in every broadcast cycle, if said field indicates thatsaid base station does not provide a broadcast indicator.
 17. A methodof claim 13, wherein the mobile station enters an idle state if thebroadcast indicator on the quick paging channel indicates that said basestation not is transmitting a broadcast message on the paging channel orthe broadcast channel.
 18. A method for receiving a broadcast message,comprising: receiving a broadcast indicator on a first common channeland checking a status of the broadcast indicator on the first commonchannel; and receiving a broadcast message on a second common channelfrom a base station when the status of the broadcast indicator on thefirst common channel indicates that the base station is transmitting thebroadcast message on the second common channel, wherein the broadcastmessage is received through the second common control channel during abroadcast cycle and wherein the first common channel is a quick pagingchannel and the second common control channel is a paging channel or abroadcast channel.
 19. The method of claim 18, wherein if the status ofthe broadcast indicator or the quick paging channel indicates that nobroadcast message is transmitted, then the paging or broadcast channelis not monitored for the broadcast message.
 20. The method of claim 18,further comprising: receiving an extended system parameters messagecontaining a broadcast indicator supported field; and checking thestatus of the broadcast indicator if the broadcast indicator supportedfield indicates that the base station has provided a broadcastindicator.
 21. The method of claim 20, wherein a first slot of thepaging channel or the broadcast channel is continuously monitored if thebase station does not provide a broadcast indicator on the quick pagingchannel.
 22. The method of claim 18, wherein the base station providesthe broadcast message indicator on the quick paging channel 100 ms priorto sending the broadcast message on the paging or broadcast channel. 23.An information slot in a quick paging channel (QPCH), comprising: aplurality of paging indicators in the QPCH to indicate that a mobilestation operating in an idle state should monitor at least one of aPaging Channel or a Forward Common Control Channel starting in a nextslot; a broadcast indicator in the QPCH to indicate whether a broadcastmessage is present on at least one of the paging channel or the ForwardCommon Control Channel; and a configuration change indicator in the QPCHto indicate that the mobile station operating in the idle state that,after performing an idle handoff, it should monitor at least one of thePaging Channel, the Forward Common Control Channel, or a BroadcastControl Channel to determine if the mobile station should update storedparameters wherein the broadcast indicator precedes the configurationchange indicator in the information slot, and wherein the informationslot is sent from a base station to a subscriber unit to indicatewhether the base station is transmitting a broadcast message.
 24. Theinformation slot of claim 23, wherein each of the broadcast indicatorand the configuration change indicator has a length of 2 bits when adata rate is 4800 bps.
 25. The information slot of claim 23, whereineach of the broadcast indicator and the configuration change indicatorhas a length of 4 bits when a data rate is 9600 bps.
 26. The informationslot of claim 25, wherein the base station is indicated to have sent abroadcast message when the broadcast indicator is set to
 1. 27. A methodcomprising monitoring broadcast indicators on a Quick Paging Channel ifan indicator is equal to “1”, wherein the indicator indicates that abroadcast indicator is supported in the Quick Paging Cannel; and theindicator is in a QPCH_BI_SUPPORTED field in an extended systemparameter message; and wherein said monitoring broadcast indicators ismonitoring slots of the Quick Paging Channel and sad monitoringbroadcast indicators on the Quick Paging Channel is performed only ifBCAST_INDEX is not equal to “000”, and wherein broadcast slots of theQuick Paging Channel are offset from common control channel slots by 100ms.
 28. The method of claim 27, wherein BCAST_INDEX is a broadcast slotcycle index.
 29. A method for sending a broadcast message comprising:setting at least one broadcast indicator in a Quick Paging Channel,wherein the broadcast indicator indicates existence of the broadcastmessage on a common control channel; transmitting said at least onebroadcast indicator from the base station; setting a first informationin an overhead message before transmitting the broadcast indicator,wherein the first information indicates a broadcast slot cycle index oftransmitting the broadcast message; setting a second information in theoverhead message, wherein the second information indicates whether ornot the broadcast indicator is supported in the quick paging channel;and transmitting the overhead message through the common controlchannel.
 30. The method of claim 29, wherein the broadcast cycle indexis 3 bits.
 31. The method of claim 29, wherein the overhead message isan extended system parameter message.
 32. The method of claim 29,wherein the first information is a broadcast slot cycle index fieldBCAST_INDEX and the second information is QPCH_BI_SUPPORTED.
 33. Themethod of claim 32, wherein the broadcast slot cycle index fieldBCAST_INDEX is i, 1≦=i≦=7.
 34. The method of claim 29, wherein thecommon control channel is a paging channel or a broadcast channel. 35.The method of claim 29, comprising transmitting the broadcast message inthe common control channel at a predetermined amount of time after saidtransmitting said at least one broadcast indicator.
 36. The method ofclaim 35, wherein the predetermined amount of time is 100 ms.
 37. Amethod comprising: receiving a broadcast indicator on a quick pagingchannel (QPCH); if the broadcast indicator indicates existence of abroadcast message, then monitoring a common control channel forreception of the broadcast message, wherein the common control channelis a paging channel or a broadcast channel; receiving an overheadmessage through a common channel before receiving the broadcastindicator on the QPCH; and obtaining a first information and a secondinformation in an overhead message, wherein the first informationindicates a broadcast slot cycle index of transmitting the broadcastmessage and the second information indicates whether or not the at leastone broadcast indicator is supported in the quick paging channel. 38.The method of claim 37, wherein the method is implemented in a mobilestation.
 39. The method of claim 38, wherein the method is implementedonly if the mobile station supports monitoring the broadcast indicatorin the quick paging channel.
 40. The method of claim 37, wherein theoverhead message is an extended system parameter message.
 41. The methodof claim 40, wherein the first information is a broadcast slot cycleindex field BCAST_INDEX and the second information is aQPCH_BI_SUPPORTED.
 42. The method of claim 41, wherein the broadcastslot cycle index field is BCAST_INDEX is 3 bits.
 43. The method of claim42, wherein the 3 bits represent a number ranging from 1 to 7.